Table of Contents

• Overview
• Remove NA values

Overview

• Stands for Not Available
• Most functions have na.rm parameter that excludes NA when it's TRUE

is.na(x)
mean(x, na.rm = TRUE)

Remove NA values howto

• To create a new dataframe without NA, use na.omit(dataframe).
• Most functions working with vectors have na.rm boolean parameter.
• When na.rm is TRUE, the functions filter NA
• Otherwise, d <- d[!is.na(d)]